Spent my entire childhood singing in groups and choirs un-amplified music. A choir doesn’t require application if the signers are taught correctly. Attended a church that only allowed un-amplified music (no instruments - voices only) performed by all the parishioners. I also spent time learning to play the guitar and the piano. I had to listen to a brother learn how to play the bagpipes.
I have a pretty good understanding what live "un-amplified" music sounds like. It sounds very different from music that is transmitted through a speaker.